In case of helically reinforced column, the ratio of volume of helical reinforcement to the volume of the core shall be
1
\(\leq 0.36\left(\frac{A_{g}}{A_{c}}-1\right) \cdot f_{c k} / f_{y}\)
2
\(\geq 0.36\left(A_{g} / A_{c}-1\right) f_{c k} / f_{y}\)
3
\(\geq 0.36\left(A_{g} / A_{c}+1\right) f_{c k} / f_{y}\)
4
\(\geq 0.36\left(1-A_{g} / A_{c}\right) \cdot f_{c k} / f_{y}\)